AP BIOLOGY

Detailed explanation-1: -The parents of a child with an autosomal recessive condition usually do not have the condition. Unaffected parents are called carriers because they each carry one copy of the mutated gene and can pass it to their children.

Detailed explanation-2: -While carriers have the dominant/recessive genotype for a given gene, they only show the phenotype caused by the dominant version of that gene.

Detailed explanation-3: -An individual with one dominant and one recessive allele for a gene will have the dominant phenotype. They are generally considered “carriers” of the recessive allele: the recessive allele is there, but the recessive phenotype is not.

Detailed explanation-4: -Carriers can either pass on normal autosomal recessive hereditary traits or an autosomal recessive hereditary disease.